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Study on Micro Mechanism of Corona Ageing Characteristics of Silicone Rubber
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Yuanyuan XIONG1, Zhiwei LI2, Rui GONG3
Insulating Materials | 2022, 55(6) : 64 - 70
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Insulating Materials | 2022, 55(6): 64-70
• Insulation Technology •
Study on Micro Mechanism of Corona Ageing Characteristics of Silicone Rubber
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Yuanyuan XIONG1, Zhiwei LI2, Rui GONG3
Affiliations
  • 1Sichuan Vocational College of Chemical Technology, Luzhou 646300, China
  • 2Chongqing Academy of Animal Sciences, Chongqing 402460, China
  • 3Meishan Power Supply Company of State Grid Sichuan Electric Power Company, Chengdu 610072, China
Published: 2022-06-20 doi: 10.16790/j.cnki.1009-9239.im.2022.06.012
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The corona accelerated ageing was conducted on silicone rubber, the insulation characteristic parameters of silicone rubber under different ageing time were measured, and the ageing mechanism of silicone rubber was deeply discussed according to the parameters. The results show that corona ageing causes serious damage to the surface structure of silicone rubber, and obvious holes and cracks are formed on its surface, resulting in serious pulverization. Corona ageing makes the long molecular chain of silicone rubber break into small molecular chain, reduces the flexibility of silicone rubber molecular chain, forms various defects, which leads to the decrease of the insulation performance of silicone rubber. With the increase of corona ageing time, the energy level centers of electron and hole traps decrease slowly at first and then decrease fast. Corona ageing leads to the gradual development of deep traps into shallow traps, reduces the binding effect on electrons, and finally leads to the occurrence of surface flashover of silicone rubber.

silicone rubber  /  corona ageing  /  insulation performance  /  trap level  /  flashover voltage
Yuanyuan XIONG, Zhiwei LI, Rui GONG. Study on Micro Mechanism of Corona Ageing Characteristics of Silicone Rubber[J]. Insulating Materials, 2022 , 55 (6) : 64 -70 . DOI: 10.16790/j.cnki.1009-9239.im.2022.06.012
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doi: 10.16790/j.cnki.1009-9239.im.2022.06.012
  • Receive Date：2021-11-22
  • Online Date：2025-12-23
  • Published：2022-06-20
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History
  • Received：2021-11-22
  • Revised：2021-12-30
Affiliations
    1Sichuan Vocational College of Chemical Technology, Luzhou 646300, China
    2Chongqing Academy of Animal Sciences, Chongqing 402460, China
    3Meishan Power Supply Company of State Grid Sichuan Electric Power Company, Chengdu 610072, China
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https://castjournals.cast.org.cn/joweb/jycl/EN/10.16790/j.cnki.1009-9239.im.2022.06.012
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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